Allowing organizations to share parts of their project data in a secure manner allows them to jointly plan and manage projects while keeping security and privacy.
For example: Software vendor <A> may have a milestone MS1 within project P1 that he would like some contractor <B> to manage for him. <A> does not wish to share all the details of project P1 with <B>, while <B> does not wish to share all the details of the plan he prepares and executes in order to deliver MS1 on time. Both project plans, of P1 and MS1, are in sync allowig both parties to work concurrently while maintaining their security and privacy.